Novice seeking help: error in bpftrace command for detecting the readline function in /bin/bash via kprobe

[try-agaaain]

I am new to bpftrace and I wanted to detect the readline function in /bin/bash via kprobe, with the help of chatgpt, I wrote the following command:

$ sudo bpftrace -e 'kprobe:/bin/bash:readline { printf("%s readline called in /bin/bash\n", comm); }'

But when I execute it, the following error appears in the terminal:

stdin:1:1-26: ERROR: kprobe probe type requires 1 argument
kprobe:/bin/bash:readline { printf("%s readline called in /bin/bash\n", comm); }

Can anyone help me to see what the problem is? Any suggestions would be appreciated!

[viktormalik]

Hi, for tracing userspace functions, you need to use uprobe, i.e. uprobe:/bin/bash:readline.

[try-agaaain]

Thanks a lot, It's helpful.